crossley



(No Model.)

F. W. CROSSLEY, H'. P. -H

OLT & F. H. ANDER-SON.

PBNDULUM GOVERNOR FOR GAS MOTOR ENGINES.

Patent dmaym, 1887.

lll/lll www l?? f-/. f. #ww

#muy

N, PETERS. maw-umqgnkher. wmingmn. D4 c;

UNITED STATES yPATENT )rrIcEo FRANCIS VM. CROSSLEY, HENRY P. HOLT, ANDFRANK H. ANDERSON, OF OPENSHAV, MANCHESTER, COUNTY OF LANCASTER,ENGLAND.

PENDULUM-GOVERNOR FOR GAS-MOTOR ENGINES.

SPECIFICATION forming part of Letters Patent No.363,508, dated May 24,1887.

, Application filed March 20, 1886, Serial No. 195,933. (No model.)Patent d in England January 52,7, 198i, No. 370.

To 'ZZ wtom/ it may concern.-

Be it known that we, FanNcIs WILLIAM CEossLEY, HENRY PERcY HoLT, andFEAIyK HERBERT ANDERSON, citizens of England, all

residing at Openshaw, Manchester, in the county of Lancaster, England,have invented a new and useful Pendulum Governor for Gas- Motor Engines,(part of which is patented in Great Britain by Lett-ers Patent No.370,dated Io January 27, 1881,) of which the following is aspecification.

Our invention relates to a governor for gas.

motor engines, applicable more particularly to those of the kind knownas the Otto silent7 l5 engine, but also applicable to other gas-motorengines which have their speed regulated, not by'varying the quantity ofgas supplied for any cylinder-charge, but by entirely suppressing thegaslsupply during a revolution or during several revolutions of theengine, whenever the speed has to be reduced. For this purpose weutilize the inertia of a suspended weight, which reciprocatcs along withthe slide or other properly-timed part of the engine,

and is so connected to the gas-supply valve that when the speed ofreeiprocation is moderate it causes the valve to be opened, but when thespeed is excessive it allows the valve to remain closed.

3o XVe will describe apparatus according to our invention, referring tothe accompanying drawings, which show its application to a gas motorengine ofthe Otto kind.

Figui-eil is a front elevation VWith the gassupply valve shown insection. Fig. 21s an end View; and Fig. 3 1s a plan.

S is a part of the engine slide-valve, which reciprocates to an fro inthe usual way for admission and ignition of the cylindercharge.

4o .On a braekea, projecting from the end of the slide, is mounted by apin, b, the hanging weight VI.' A fork, w, projecting from W, above thepin b, embraces a collar -bolt, C, which is strained against the boss b'of the 4.5 bracket B by a helical spring, c, that can be adjusted togive more or less strain by screwing or'unscrewing a linger-nut, c'.From an arm, w', of the weight lV projects an elastic blade, A,terminating in a somewhat sharp 5o ened edge at ct. The gas-valve Greceives sup ply of gas by the branch g, which can be closed by astop-cock, g. The valve itself is pressed by a spring, g2, against itsseat, beyond which there is the usual passage, g3, leading to the portin the facing, against which the slide- .5 valve S works. The stem g ofthe valve projects through thc end of the valve-box and abuts against alever, H, which is suspended by a pin, lt ,from a bracket, h, projectingfrom the valve-box G. At the lower end ofthe le, I' o ver H is fixed inan inclined attitndea piece,

K, having in its front a notch between a long Vupper lip, k, and a shortlower lip, On the bracket B is loosely pivoted a rod, b2, the end ofwhich enters a shallow notch in the face of 6: the weight W'. While Vremains in the posiu tion shown the rod b'l remains engaged in itsnotch; but when V swings away toward the right the rod b'l drops to theposition indicated by thc dotted lilies b" in Fig. l, leaving YV free 7oto swing to and fro. The spring c,` being adjusted by the nut c' to suitthe desired speed ofthe engine, the action of the apparatus is asfollows:

When the slidevalve S makes its stroketoward. the left, the weight XVaccompanies it, provided that the speed of the stroke is not too great,and the edge c of the blade A engages in the notch between 7.:l and k.As the slide-valve continues its stroke toward the 8o left the leverH,moved by A,pushes the valvestem g* and opens the gas-valve G, inopposition to the spring g2, the valve G being retained open until theslide-valve S has moved so far back toward the right that the blade Aleaves K.' The parts a and K are so arranged relatively to the portsgoverned by the slidefv valve S that this opening of the valve Gcoincides with the opening of the supply-port of the cylinder by theslide-valve S. Thus as 9o long as the speed with which the slide-valve Seffects its reciprocation is not greater than that due to the normalspeed of the engine there is a supply of gas given at every lefthandstroke ofthe slide-valve S. Should the speed of the engine exceed thenormal, then, on the movement of the slide-valve S to the left, theinertia of the weightW, if suiicient to overcome the force of theadjusted spring c, or ofgravity, in combination, or of gravity alone,too

if preferred, causes it to hang back, thus depressingthebladeA.Theedgeaisthusmadeto miss the notch of K, and the slide-valve makes itsstroke without opening the gasvalve G. The supply of gas may thus beentirely suppressed for one stroke or for several strokes, the engineworking idly until its speed becomes so far reduced that the edge aagain engages in the notch ol' K, and causes a fresh supply of gas to begiven. By adjusting the spring` c by screwing up or screwing back thenut c the normal speed-that is to say, the speed at which a willregularly engage in the notch of K-can be made greater orless asdesired. When the engine stops, the weight W swinging toward the leftraises the blade A, so that if the slidevalve should be moved toward theleft the edge a passes clear above the lip 7c, failing to open thegas-valve. On the return of the slide to the right the weight WV can bepropped back by raising the rod bIl into a position ready for startingthe engine afresh, and when the engi ne is started it will continue inthis position until the speed becomes such that W hangs back, releasingthe rod b2, which drops, leaving \V free to operate for governing theengine, as above described.

Having thus described the nature of our inventionand the best means weknow of carrying it out in practice, we claim* l. In a pendulum-governorfor gas-motor engines, the combination of the weight snspended from andreciprocating with the slide S, or other proposed time part of theengine, havingits swing in one direction resisted np to a certain speedby gravity, and afterward by an adjustable spring, the blade-armprojecting from it and toward a notch at the end of the lever againstwhich abuts the stein of the spring gas-valve, as and for the purposedescribed.

2. In a pendulum-governor for gas-motor engines, the combination of theweight VV', provided with the fork w, suspended from and reciprocatingwith the slide S, mounted upon the bracket B, the rod b2 pivotedthereto, and the arm A, terminating in a sharpened edge, a, toreceivethe notch in the piece K, secured to the lever H, suspended fromthe bracket ofthe spring gasvalve, as and for the purpose the bracket B,the swinging weight "W, and elastic blade-arm A, secured thereto andterminating in a sharpened edge, a, for receiving the notch in the pieceK, secured to thelever H,sus pended from the bracket h that abutsagainst the stem of the spring gas-valve, as and for the purposedescribed.

4. In a pendulum-governor for gasmotor engines, the combination of thegas-valve G, through which the stem g projects and abuts against thelever H, at or near its center, and hinged to the bracket h2, the springg2, secured within the gas-valve G, the elastic blade A, terminating ina sharpened edge to receive the notch in the piece K, and weight W,hinged to the bracket B, secured to the slide S of the engine, thespring c, and n nt c for regulating the speed, as and for the purposedescribed.

5. In a pendulum-governor for gas-motor engines, the combination oftheweight XV, provided with the fork w, hinged to the bracket B, andreciprocating with the slide S, or other proposed time part ot' theengine, resisted in -one direction by the collar-bolt C, carrying thespring c, and finger-nut c', ruiming in the boss b', secured to thebracket B, the elastic blade A, terminating in a sharpened edge, a, forreceiving the notch inthe piece K, attached to the lever H, as and forthe purpose described.

6. Inapenduluin governor for gas-xnot0r engines, the combination of theslide S, or other proposed time part of the en gi ne, p rovided with theb oss b', secured to the bracket B, the collar bolt C, carrying thehelical spring c, provided with the fork w, and the elastic blade A,terminating in a sharpened edge, a, and secured to the arm w forreceiving the notch in the piece K, secured to thelever H ofthegas-valve, and the rod b2 for receiving the recess in the said weight,as 'and for the purpose described.

In testimony whereof we have signed our names to this specification, yinthe presence of two subscribing witnesses, this 23d day ot' February, A.D. 1886.

FRANCIS WM. CROSSLEY. HENRY P. HOLT. FRANK H. ANDERSON.

XVitnesses:

Ronr. ToMLINsoN, ROBERT VARDLE, Nota'rys Clerks, 56 Brown Street,llflanchester.

